String creation and literal types in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this string literal code?

Consider the following C# code snippet. What will be printed to the console?

C Sharp (C#)

string path = @"C:\Users\Admin\Documents";
Console.WriteLine(path);

A C:\\Users\\Admin\\Documents

B C:\Users\Admin\Documents

C C:/Users/Admin/Documents

D C:UsersAdminDocuments

💡 Hint

Look at how the @ symbol affects backslashes in string literals.

The @ symbol before the string makes it a verbatim string literal, so backslashes are treated as normal characters and do not need to be escaped. Thus, the output shows single backslashes.

❓ Predict Output

intermediate

What does this string interpolation print?

Given the code below, what is the output?

C Sharp (C#)

int x = 5;
int y = 10;
string result = $"Sum of {x} and {y} is {x + y}";
Console.WriteLine(result);

A Sum of 5 and 10 is 15

B Sum of x and y is x + y

C Sum of {x} and {y} is {x + y}

D Sum of 5 and 10 is x + y

💡 Hint

Remember how variables inside $"..." strings are evaluated.

The $ symbol before the string allows expressions inside braces to be evaluated and inserted into the string. So {x} becomes 5, {y} becomes 10, and {x + y} becomes 15.

🔧 Debug

advanced

What error does this code raise?

Examine the following code. What error will occur when compiling or running it?

C Sharp (C#)

string s = "Hello\nWorld";
Console.WriteLine(s);

A Output: Hello (newline) World

B RuntimeException: Newline not allowed in string

C SyntaxError: Invalid escape sequence

D Compile-time error: Unterminated string literal

💡 Hint

Check how escape sequences like \n work in C# strings.

The \n is a valid escape sequence representing a newline character. The string prints Hello, then a newline, then World.

🧠 Conceptual

advanced

How many characters does this string contain?

What is the length of the string created by this code? string s = @"Line1\nLine2";

A 11

B 9

C 10

D 12

💡 Hint

Remember that verbatim strings treat backslashes as normal characters.

The string is verbatim, so \n is two characters: a backslash and an 'n'. Counting all characters: L i n e 1 \ n L i n e 2 = 12 characters.

❓ Predict Output

expert

What is the output of this complex string creation?

Analyze the code and determine what is printed:

C Sharp (C#)

string s = $@"Path: C:\Users\{Environment.UserName}\Documents";
Console.WriteLine(s);

A Path: C:\Users\\Documents

B Path: C:\Users\{Environment.UserName}\Documents

C Path: C:\Users\Admin\Documents

D Path: C:Users{Environment.UserName}Documents

💡 Hint

The string uses both $ and @ symbols. Consider how interpolation and verbatim strings combine.

The $@ combination means the string is verbatim and interpolated. Backslashes are literal, and expressions inside braces are evaluated. Environment.UserName is replaced by the current user name, e.g., Admin.